Change of state crossword

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Across
  1. 2. without a clearly defined shape or form
  2. 4. (of a reaction or process) accompanied by or requiring the absorption of heat
  3. 7. a substance that flows freely
  4. 8. attraction of the particles in the surface layer
  5. 9. the temperature at which a liquid turns into a solid when cooled.
  6. 12. Any change of a substance from one physical state (solid, liquid or gas) to another.
  7. 14. solid, liquid, gas, and plasma.
  8. 15. accompanied by the release of heat
  9. 16. becoming liquefied by heat.
  10. 17. hard
  11. 18. the state of being thick, sticky
Down
  1. 1. the transition of a substance directly from a solid state to a gas state
  2. 3. having the structure and form of a crystal
  3. 5. water which collects as droplets on a cold surface when humid air is in contact with it.
  4. 6. at or near boiling point. at or near boiling boiling point the temperature at which a liquid boils and turns to vapor.
  5. 10. the process from turning liquid to vapor
  6. 11. to fill the whole of a container
  7. 13. be turned into ice or another solid as a result of extreme cold.